Which of the following statements about the effect o 7.u)/jn/c cxzn:pfli f surface area and volume on the cell’s processes is /pzc.i fc j:7)l/xnnufalse?

  Which statement best describes / xw.uj9zw ph ak9wa1q2m6.jxstem cells?

  Which is a correct description of the cell type adapted for gas exchange in tc a80uzrw1e/she lung/areu8c0ws1 zs?

  Which of the following explains the limitations on ce)laa- b:usw b*y14sswcgy3 6-k 4s.xcoh.rqtll size?

  What is this cell's most likely primary function, anldwrt5:(c g) md where could it be located in a ma :w)rl dt(gm5cmmal?

  Which of the following characteristics of tz 77a o,zrie u,)26ikqyt9 bw 6mr4jknype I pneumocytes contribute to increasing the rate of ga72o7un ar w,k6,btki mzqijze)6 4 r9ys exchange?
I.
Cells are flattened
II.
Secretion of a surfactant
III.
Cover less than 10% of the alveolar surface

  A patient receives a bone ma.h;j)p57/q vn isn e-bgc9p qqrrow transplant from a 36 year old. One of the functions of these cells is to produce red and white blood cells. What type of stem cells has the patient)sqhpqb/c 9;jgn7vpqne .5i- received?

  Based on the Venn diagram, whichop e-e. x a7rc6k+eh7e identifies cardiac muscle cells and striated muscle fibres?x+e.eec erh7k7p -o6a

Below is a diagram of a motor neuron. Neurons are the longest cells in the hu 721x*m4vfe r yznr6l; pxm;zlman bodyzy7 2l;rvfm1p4*xln ; 6ezrm x.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from infant respiratory di.j02s tagf ff2t.mixt4) 8o ujstress syndrome, which could be caused by a lack of sufficient surfac.j8)ttfxit4s220u aom.jffg tant in the pulmonary alveoli. The diagram below shows two different alveoli structures.


1.Describe one feature of the surfactant.

2.Suggest a treatment for infant respiratory distress syndrome.

3.Draw a labelled diagram of the structures in an alveolus that are important for gas exchange.

  Which of the following is a reason that embryonbwphh,e1 kyuq a+7(1sic stem cells are not used in the treyka1h(u +w he17psbq, atment of leukaemia?

  The table shows the diameters of red blood cells from different organisms. Whrp iu lt0g*oba 55+zd+vr :w-qich red blood cell wilabtdv0q + ig- zr uw+rl5o*p5:l have the highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells lining the proxima0.rs dz(8xcsur +wra *l convoluted tubule make these cells more ac rau*8(.r +zxssd0wr dapted to the functions they perform.

2.Compare and contrast the structure of striated muscle cells and cardiac muscle fibres.

3.Explain how the structure of egg and sperm cells are adapted to their functions.

  Which statements about embryonic stem cells and specialised ce,cna7a5t 4mh uqp;wgi58 q6z 0-lnvd wlls is/are not true?5 -qwgacqzi ; npv8hlamun046, wt7 5d

I. Embryonic stem cells have higher levels of DNA methylation than differentiated cells
II. Specialised cells are more differentiated than embryonic stem cells
III. Most specialised cells and embryonic stem cells both contain the entire genome of an organism

  In humans, which of the following is the correct order from sja 9qyr/n 9 tpqqz(h4o up)n8(mallest to largest?9()hyoj8q q/ zunqp (rn4t9p a

  Which row in the following table gives the correct disadvantages of the di edv8-g0;sdks fferent stem cell 0-;k v dsg8sedsources for therapeutic uses?

1.Describe how the use of stem cel ;.a6sfq ;dcyhdpcw(1 3ecto8 yxw*f*ls may be used to treat type I diabetes in the future.f 3;*6yda .eccos*chf;pw81xw(t yq d

2.Explain the factors that limit cell size in humans.

3.Explain how red blood cells and striated muscle fibres are adapted to their function.

Below are diagrams of specialised 9up t*i9 n jbhoju-.ma 0+74kr .uyiyvcells (not to scale).

1.Put these cells in order of size, from the smallest to the largest.

2.Compare and contrast totipotent, pluripotent and multipotent stem cells.